Which causes the production of vitamin D in humans?

A. ultraviolet rays

B. radio waves

C. gamma rays

D. X-rays

A screen is placed 1.60 m behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.40 cm wide-that is, the two first-order diffraction minima are separated by 1.40 cm.

John pushes his brother Danny on a skateboard. John applies a force of 150 N and Danny's acceleration is 1.2 m/s^2. what is the combined mass of danny and his skateboard

How is it possible to blow a balloon?

The diameter of a 12-gauge copper wire is about 0.790 mm. If the drift velocity of the electrons is 3.25 mm/s what is the electron current in the wire? The number of electron carriers in 1.0 cm3 of copper is 8.5 * 1022.

Listening to your favorite radio station involves which area of physics? a-) optics b-) thermodynamics c-) vibrations and wave phenomena d-) relativity

As the amount of charge on two objects increases, the strength of the electrical force between the objects

Which of the two resistors dissipates the larger amount of power?

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2.

Which is a use of fiber optics?

When a positively charged conductor touches a neutral conductor, the neutral conductor will: